在泥质岩中如含()的砂质成分,则应命名为()。
参考答案:10%~25%;含砂泥岩
组成核酸的基本单位是()
A.氨基酸
B.单核苷酸
C.多核苷酸
D.DNA
E.RNA
It is said that the engines of Flight MH370____while flying over the Indian Ocean,with all on board killed .
A.broke out
B.ran out
C.gave out
D.wore out